— Have you ever visited the Opera House?—Yes.When I was in Sydney, I ______ it twice.
#102371
A
have visited
B
had visited
C
visited
D
would visit
推荐题目
His sister left home in 1998, and _________ since then. 
#100164
A
hadnotbeenheard
B
hasnotbeenheardof
C
hadnotheardof
D
hasnotheardof
---- You look tired. ---- Yeah, I ________ since 4 o’clock.
#103605
A
had played
B
have been playing
C
am playing
D
have been played